Yes, they do have a fairly fast response rate :) which is a very BIG plus!
They are an approved and verified supplier here in our directory. I have checked both www.bbb.org and www.mywot.com for any complaints filed against this supplier and there was none at all.
If you're a bit unsure, just do a trial order - order something small or inexpensive just so you can check their reliability as a supplier as well as the quality of their products. And remember to use you credit card when paying so you can easily do a chargeback should anything go wrong.
Hope this helps. Cheers! :)